Addition of Vectors

Illustrate the addition of the following two vectors and calculate the resulting vector: 55km [South] + 34km [North].

2. Relevant equations

3. The attempt at a solution

The attempt at the solution is below. What is troubling me is the overlap of the vectors and how to draw it. Is a vertical line a proper illustration of the addition for those two vectors? Also, do I need an arrow? If so, which way would it be pointing? My answer for the resulting vector is 21km [South].